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Deciphering GunType Hierarchy through Acoustic Analysis of Gunshot Recordings

Created by
  • Haebom

Author

Ankit Shah, Rita Singh, Bhiksha Raj, Alexander Hauptmann

Outline

This study emphasizes the importance of timely and accurate information on the increase in gun crimes, and aims to develop an inexpensive gun detection and classification system that utilizes acoustic analysis of common devices such as smartphones as an alternative to expensive commercial gun detection systems. Using a dataset of 3,459 gun sound recordings, we analyzed acoustic features (muzzle blast and shock wave) by gun type, and evaluated the performance of gun detection and classification using SVM and CNN-based machine learning models. As a result, we confirmed that the CNN model showed better performance (mAP 0.58 vs. 0.39) than the SVM model, but the performance deteriorated (mAP 0.35) when using web data containing noise. Ultimately, we aim to develop an accurate and real-time system that operates on common recording devices to provide important information to first responders.

Takeaways, Limitations

Takeaways:
Presenting the possibility of developing a system capable of detecting and classifying firearms at low cost.
Achieving improved performance over existing SVM models by utilizing CNN-based deep learning models.
To verify the feasibility of building a real-time gun detection system using common devices (e.g. smartphones).
It can help improve public safety by quickly providing critical information to first responders.
Limitations:
Data quality, sensitivity to environmental noise.
Performance degradation when using web data that contains noise.
Additional research and validation are needed for practical field applications.
Additional data acquisition and model improvement are needed to improve generalization performance.
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